Design a Metrics and Alerting System

Problem Overview

Design a metrics and alerting system. That is the prompt as reported. What the one report adds: - It was the design round, the first of the day, in a Citadel Securities C++ software-engineer onsite that the recruiter described as five rounds, including design, a two-hour coding round, a one-hour…

• 3 candidate-reported follow-ups — the exact probes interviewers asked, with the trigger for each
• The rest of the problem statement — full requirements, constraints, and edge cases
• Approach and trade-offs — what passing candidates did, and the mistakes that sink people